Until 1991, the Internet was restricted to use only "...for research and education in the sciences and engineering..." and was used for email, telnet, FTP and USENET traffic—but only a tiny number of web pages. The World Wide Web protocols had only just been written and not until the end of 1993 would there be a graphical web browser for Mac or Windows computers. Even after there was some opening up of internet access, the situation was confused until 1995.
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Domain names can be used in a number of ways. Direct visitors to your website’s home page or use complementary domains to send them to specific areas of your website ( e.g. yourcompany.jobs for a careers page). Or, forward a custom domain to an existing social media account, like your Twitter profile or Periscope channel. With a domain name you can even set up custom email addresses like firstname.lastname@example.org, which can be used to conduct business or communicate with your followers. More.
Bluehost does offer an automatic backup system along with daily scheduled backups, albeit these are only included for free with certain hosting plans. However, you can add a backup system to the packages that don’t already include it for just $3 a month, which is a small price to pay for keeping your files safe. That, or you can simply back up your files via FTP as mentioned earlier.